(2nd LD) Efforts to get N. Korea to denuclearize 'probably a lost cause': U.S. intelligence chief

(ATTN: CHANGES dateline; ADDS South Korea's response in last 2 paras)By Chang Jae-soon

WASHINGTON/SEOUL, Oct. 25 (Yonhap) -- Any effort to get North Korea to give up its nuclear program "is probably a lost cause" and putting a cap on the regime's nu